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[mil-uh-rent-guh n, -juh n, -ruhnt-]
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  1. a unit of radiation equal to one thousandth of a roentgen. Abbreviation: mR, mr
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Origin of milliroentgen

1950–55; milli- + roentgen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for milliroentgen

Historical Examples

  • A one-hour visit to the inner fenced area will result in a whole body exposure of one-half to one milliroentgen.

    Trinity [Atomic test] Site

    White Sands Missile Range Public Affairs Office